title: Zig-zag active-mirror laser with cryogenic Yb3+:YAG/YAG composite ceramics.
abstract: We report on a novel amplifier configuration concept for a 10 kW laser system using a zig-zag optical path based on a cryogenic Yb:YAG Total-Reflection Active-Mirror (TRAM) laser. The laser material is a compact composite ceramic, in which three Yb:YAG TRAMs are combined in series to increase the output power. Output powers of up to 214 W with a slope efficiency of 63% have been demonstrated for CW operation, even at a quite low pump intensity of less than 170 W/cm2. Further scaling could achieve output powers of more than 10 kW.
authors.affiliation: Institute for Laser Technology, 2-6 Yamada-oka, Suita, Osaka, Japan. furuse-h@ile.osaka-u.ac.jp
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Furuse
authors.forename: Junji
authors.initials: J
authors.lastname: Kawanaka
authors.forename: Noriaki
authors.initials: N
authors.lastname: Miyanaga
authors.forename: Taku
authors.initials: T
authors.lastname: Saiki
authors.forename: Kazuo
authors.initials: K
authors.lastname: Imasaki
authors.forename: Masayuki
authors.initials: M
authors.lastname: Fujita
authors.forename: Kenji
authors.initials: K
authors.lastname: Takeshita
authors.forename: Shinya
authors.initials: S
authors.lastname: Ishii
authors.forename: Yasukazu
authors.initials: Y
authors.lastname: Izawa
mesh_terms: D000669:Amplifiers, Electronic; D002516:Ceramics / Q000737:chemistry*; D003080:Cold Temperature; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D007909:Lenses